Other spectroscopies

[bruceravel]

XDI would be quite satisfactory for single scan files of several other types of spectroscopy, including XES, NIXS, DAFS, and ReffleXAFS. Supporting these types would require definition of new defined headers. Headers similar to Mu transmission (i.e. headers which take MATH rules) could simultaneously identify the spectroscopy type and provide the appropriate hint for constructing a spectrum from the columns.